एपीए उद्धरण

Tignor, R. (2008). Worlds Together, Worlds Apart: A History of the World. McGraw - HillCompanies, Inc.

शिकागो स्टाइल उद्धरण

Tignor, Robert. Worlds Together, Worlds Apart: A History of the World. McGraw - HillCompanies, Inc, 2008.

एमएलए उद्धरण

Tignor, Robert. Worlds Together, Worlds Apart: A History of the World. McGraw - HillCompanies, Inc, 2008.